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NCP1562A Datasheet(PDF) 1 Page - ON Semiconductor

Part No. NCP1562A
Description  High Performance Active Clamp/Reset PWM Controller
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Maker  ONSEMI [ON Semiconductor]
Homepage  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

NCP1562A Datasheet(HTML) 1 Page - ON Semiconductor

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 Semiconductor Components Industries, LLC, 2010
November, 2010 -- Rev. 5
1
Publication Order Number:
NCP1562A/D
NCP1562A, NCP1562B
High Performance Active
Clamp/Reset PWM Controller
The NCP1562x is a family of voltage mode controllers designed
for dc--dc converters requiring high--efficiency and low parts count.
These controllers incorporate two in phase outputs with an overlap
delay to prevent simultaneous conduction and facilitates soft
switching. The main output is designed for driving a forward
converter primary MOSFET. The secondary output is designed for
driving an active clamp circuit MOSFET, a synchronous rectifier on
the secondary side, or an asymmetric half bridge circuit.
The NCP1562 family reduces component count and system size by
incorporating high accuracy on critical specifications such as
maximum duty cycle limit, undervoltage detector and overcurrent
threshold. Two distinctive features of the NCP1562 are soft--stop and
a cycle skip current limit with a time threshold. Soft--stop circuitry
powers down the converter in a controlled manner if a severe fault is
detected. The cycle skip detector enables a soft--stop sequence if a
continuous overcurrent condition is present.
Additional features found in the NCP1562 include line feed--
forward, frequency synchronization up to 1.0 MHz, cycle--by--cycle
current limit with leading edge blanking (LEB), independent under
and overvoltage detectors, adjustable output overlap delay,
programmable maximum duty cycle, internal startup circuit and
soft--start.
Features
Dual Control Outputs with Adjustable Overlap Delay
>2.0 A Output Drive Capability
Soft--Stop Powers Down Converter in a Controlled Manner
Cycle--by--Cycle Current Limit
Cycle Skip Initiated if Continuous Current Limit Condition Exists
Voltage Mode Operation with Input Voltage Feedforward
FixedFrequencyOperationupto1.0 MHz
Bidirectional Frequency Synchronization
Independent Line Undervoltage and Overvoltage Detectors
Accurate Programmable Maximum Duty Cycle Limit
Programmable Maximum Volt--Second Product
Programmable Soft--Start
Internal 100 V Startup Circuit
Precision 5.0 V Reference
These are Pb--Free Devices
Typical Applications
Telecommunications Power Converters
Low Output Voltage Converters using Control Driven Synchronous
Rectifier
Industrial Power Converters
42 V Automotive System
ATX Power Supplies
TSSOP--16
DT SUFFIX
CASE 948F
x
= Current Limit (A, B)
A
= Assembly Location
WL, L
= Wafer Lot
Y
= Year
WW, W = Work Week
Gor G
= Pb--Free Package
MARKING
DIAGRAMS
NCP
562x
ALYWG
G
http://onsemi.com
SO--16
D SUFFIX
CASE 751B
See detailed ordering and shipping information in the package
dimensions section on page 24 of this data sheet.
ORDERING INFORMATION
NCP1562xG
AWLYWW
1
16
(Note: Microdot may be in either location)


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